Write the conversation response. 
* Who won the men's doubles event at the 2010 Rakuten Japan Open Tennis Championships?
* 2010 Rakuten Japan Open Tennis Championships – Doubles Julian Knowle and Jürgen Melzer were the defending champions, but they lost to Marcelo Melo and Bruno Soares in the quarterfinal.
* Who was the runner-up?
* 
Eric Butorac and Jean-Julien Rojer won in the final 6–3, 6–2, against Andreas Seppi and Dmitry Tursunov.